fix: 质量修复 — ESLint 规则 TS6 兼容 + catch 注解 + 空函数体注释化 + 后端架构对齐 + 前端红线修复

- enforce-catch-type: 增加 TSUnknownKeyword 判断，消除28个 TS6 假阳性
- no-empty-function: 统一为注释方案，移除测试/生产分支和 eslint-disable 引导
- logger.ts: 空函数体改为注释说明，删除无用 eslint-disable 指令
- 补充15处 catch 子句 : unknown 类型注解
- 清理7个测试文件失效 eslint-disable 指令
- chat/send.ts: 提取 getModelWithProvider DAO，消除直接 Drizzle 操作
- projects/update.ts: 修复死代码+条件逻辑 bug
- providers/update.ts: 补充至少一个字段校验
- 前端: inline style → CSS className, ProviderFormModal whitespace 校验
- 开发文档: 更新 Zod 使用说明（AI SDK 框架级约束）

tests/web/components/query-client-logging.test.tsx

@@ -30,7 +30,6 @@ describe("QueryClient MutationCache onError", () => {
           mutate(
             { name: "test" },
             {
-              // eslint-disable-next-line @typescript-eslint/no-empty-function
               onError: () => {},
             },
           );

tests/web/hooks/on-success-logging.test.tsx

@@ -1,5 +1,3 @@
-/* eslint-disable @typescript-eslint/no-empty-function */
-
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
 import { render } from "@testing-library/react";
 import { describe, expect, mock, test } from "bun:test";

tests/web/hooks/use-logger.test.ts

@@ -1,5 +1,3 @@
-/* eslint-disable @typescript-eslint/no-empty-function */
-
 import { describe, expect, mock, test } from "bun:test";
 import { createElement } from "react";
 

tests/web/utils/api.test.ts

@@ -1,4 +1,3 @@
-/* eslint-disable @typescript-eslint/no-empty-function */
 import { describe, expect, mock, test } from "bun:test";
 
 import { handleResponse, handleVoidResponse } from "../../../src/web/utils/api";

tests/web/utils/logger.test.ts

@@ -1,5 +1,3 @@
-/* eslint-disable @typescript-eslint/no-empty-function */
-
 import { describe, expect, mock, test } from "bun:test";
 
 import type { Sink } from "../../../src/web/utils/logger";